Method of and apparatus for determining the purity of carbonic-acid gas



C. SPINDLER;

METHOD OF AND APPARATUS FOR DETERMINING THE PURIIY 0F CARBONIC ACID GAS. APPLICATION man NOV. 2|. 191s.

Patented May 13, 1919,

INVEA/TUR CHAF. .G'P/NDLER OFFICE:

cnAnLns srrnntnn, or sannnancrsco METHOD 01* AND APPARATUS Eon. DETERMINING THE PURITY or CARBONIG-AGIID GAS.

Specification of Letters Patent. Patented lI ayglS, 1919,

Application filed November 21, 1918,. Serial No. 268,467.

To all whom it may concern Be it known that 1, CHARLES SPINDLER,

a citizen of the United States, residing at.

San Francisco, in the county of San Francisco and State of California, have invented new and useful Improvements in Methodsof and Apparatus for Determining the Purity of Garbonic-Acid Gas, of which the follow-..

called soft drinks, or cider,.beer. and wine,

caustic soda is employed. In the present method degree of purity. a .sampleof the gas is in: closed in a "vessel comprisingfas part of it, a glass tube graduated'above99% in tenths of 1%. A solution oficaustic soda is then :fed into .the" gas-cdntaining vesselgl' The caustic soda absorbs all the I carbonic purities.

This process "ve, and it .requlres a morejor less skilled?- man to manipulate it.

The object of the present inventionisto provide amethod of determining the, com.- parative purity of carbonic acid gaswhl'ch will be simple, easy and quick,"and anapparatus for carrying out said method which will be inexpensive.

In the accompanying drawingthe figure is a side view of my improved apparatus, a

vessel forming va part thereof being shown degree of purit --'(by,

of determiningthe slow, the apparatus employed is delicate and comparatlvelyrexpem;

the pipe 1 is a vent pipe 8 having a controlling valve 9 therein.

I do not regard said pi e 8 and valve 9 as 'an essential part. 0 my invention, although its use is preferable. it to be used the operation is as follows:

When the generation of carbonic acid gas is started,,the valves 2 and 4: are closed and the valve 9is opened." At thattime the carbonic acid gas is mixed with a considerable proportion of air and other impurities.

Thismixture is allowed toescape by the pipe 8. When the stage of the operation approaches at which the carbonic acid. gas is sutfi'cientlypure, tlievalve 9 is closed and the valve 4L opened. Thereafter the mixture descendsby the pipe-3 and is discharged into the'caustic sodazandsthe small percentagef been; still contained in the mixture is not dissolved"'thereby'but *flows" upward there;

through'iii'i the form of "bubbles and escapes- .zthroiaglttthe :opentop cf the vessel. When acid gas, and the remaining air space indicates the'percentage of air and other im-wthefbubbles-can no longer be seen it is known that-'no air is Jmiked with: the gas and that the arbonic acid'gas at least 99% pure. .tlie kvalveaiis' closed'and the valve dto permit? the carbonic acid gas 1 her tfisidesiiedtobensed. Theagreat e tummy and simplicity. of the .Iclaun;

1'i. The3method of. determining the stage Supposing apparatusandlprocess are at once apparent.

in thefiproduction.ofi' carbonic acid gas at whichiitbecomes. substantially free from admixture with air which consists in causing the "mixture .to flow through a solution of caustjq soda and observing the presence or absence of bubbles in the caustic soda.

2. An apparatus for determining the stage i V in the process of generation of carbonic acid gas at which the carbonic acid gas becomes substantially free from admixture with air comprising a delivery pipe for delivering the carbonic acid gas to the place of consumption, a valve therein, a test pi e lead ing from the delivery pipe, a vesse and a solution of carbon dioxid absorbent in said vessel, the testing'pipe discharging below the surface of said solution.

. 3. An apparatus for determining the stage in the process of generation of carbonic acid as at which the carbonic acid gas becomes substantially free from admixture with air comprising a delivery pipe for delivering the carbonic acid gas to the place of consumption, a valve therein, a test pipe leading from the delivery pipe behind said valve,

a valve in said testing pipe, a vessel, a solution of carbon dioxid absorbent in said ves- 10 sel, the testing pipe discharging below the surface of said solution, a vent pipe also leading from the delivery pipe behind said valve and a controlling valve therein.

1 CHARLES SPINDLER. 

